Abstract
The present study investigated on the diversity, pathogenicity, and cultural characteristics of Sclerotium rolfsii associated with collar rot in tuber crops across six Agro-Ecological Units (AEUs) of Kerala, India. Thirty-two samples were collected from infected elephant foot yam (Amorphophallus paeoniifolius), Taro (Colocasia esculenta), and Dioscorea (Dioscorea alata) plants in five districts during 2023-2024, exhibiting typical symptoms such as leaf yellowing, collar rot, and sclerotia formation. The pathogen was isolated using standard isolation techniques on Potato Dextrose Agar (PDA), and pathogenicity is proved by Koch’s postulates by mass multiplying tha pathogen in sand oat meal and inoculating in soil. Virulence assays revealed IA17 (from Orkatteri) was identified as the most aggressive isolate in elephant foot yam, while IC4 (from Chonadam) and ID3 (from Cherthala) were most virulent on Colocasia and Dioscorea, respectively. Cultural characterization demonstrated significant variability in mycelial growth, time for sclerotial initiation, number of sclerotia, and their distribution patterns. Notably, IA10 produced the highest number of sclerotia (211 per plate), whereas IC1 had the lowest (25). The findings underscore the morphological and pathogenic diversity of S. rolfsii in Kerala, with implications for resistance breeding strategies against the diseases in yams.
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Claims 6
Claim · model-written summary
IA17 was the most virulent Sclerotium rolfsii isolate on elephant foot yam.
- Taxon
- elephant foot yame0
- Material
- IA17e0
- Interactor
- Sclerotium rolfsii
Agroathelia rolfsiit0pathogen - Outcome
- most aggressive isolatee0
- Setting
- Orkatterie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IA17 (from Orkatteri) was identified as the most aggressive isolate in elephant foot yam, while IC4 (from Chonadam) and ID3 (from Cherthala) were most virulent on Colocasia and Dioscorea, respectively.”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”
Claim · model-written summary
IC4 was the most virulent Sclerotium rolfsii isolate on Colocasia.
- Material
- IC4e0
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Outcome
- most virulente0
- Setting
- Chonadame0
ColocasiaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IA17 (from Orkatteri) was identified as the most aggressive isolate in elephant foot yam, while IC4 (from Chonadam) and ID3 (from Cherthala) were most virulent on Colocasia and Dioscorea, respectively.”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”
Claim · model-written summary
ID3 was the most virulent Sclerotium rolfsii isolate on Dioscorea.
- Material
- ID3e0
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Outcome
- most virulente0
- Setting
- Cherthalae0
DioscoreaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IA17 (from Orkatteri) was identified as the most aggressive isolate in elephant foot yam, while IC4 (from Chonadam) and ID3 (from Cherthala) were most virulent on Colocasia and Dioscorea, respectively.”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”
Claim · model-written summary
Sclerotium rolfsii isolates varied significantly in mycelial growth, sclerotial initiation, number and distribution.
- Taxon
- Yamst0
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Outcome
- mycelial growth, time for sclerotial initiation, number of sclerotia, and their distribution patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultural characterization demonstrated significant variability in mycelial growth, time for sclerotial initiation, number of sclerotia, and their distribution patterns.”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”
Claim · model-written summary
IA10 had highest number of sclerotia (211 per plate).
- Taxon
- Yamst0
- Material
- IA10e0
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Outcome
- number of sclerotiae0
- Direction
- highest number of sclerotiae0
- Value
- 211 per platee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IA10 produced the highest number of sclerotia (211 per plate), whereas IC1 had the lowest (25).”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”
Claim · model-written summary
IC1 had lowest (25).
- Taxon
- Yamst0
- Material
- IC1e0
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Outcome
- number of sclerotiae0
- Direction
- loweste0
- Value
- 25e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IA10 produced the highest number of sclerotia (211 per plate), whereas IC1 had the lowest (25).”
t0“Sclerotium rolfsii Causing Collar Rot of Yams”